text: from main import BaseHandler
  from google.appengine.ext import ndb
  import time
  
  
  class DeleteCommentHandler(BaseHandler):
      """Comment deletion handler"""
  
      def get(self):
          if self.user:
              comment_id = self.request.get("comment")
              key = ndb.Key('Comment', int(comment_id))
              comment = key.get()
              if comment:
                  if comment.author.username == self.user.username:
                      self.render("deletecomment.html", comment=comment)
                  else:
                      error_message = "You can't delete a comment posted by"\
                          " other user"
                      self.redirect('/unauthorized?error=' + error_message)
              else:
                  self.error(404)
                  return
          else:
              error_message = "You can't delete a comment without logging in."
              self.redirect('/login?error=' + error_message)
  
      def post(self):
          comment_id = self.request.get("comment")
          key = ndb.Key('Comment', int(comment_id))
          comment = key.get()
          if comment and comment.author.username == self.user.username:
              post_id = comment.post_id
              key.delete()
              time.sleep(0.1)
          self.redirect("/blog/%s" % post_id)
  